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+// Copyright (C) 2011 The Libphonenumber Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef I18N_PHONENUMBERS_ENCODING_UTILS_H_
+#define I18N_PHONENUMBERS_ENCODING_UTILS_H_
+
+#include "phonenumbers/base/basictypes.h"
+#include "phonenumbers/utf/unilib.h"
+#include "phonenumbers/utf/utf.h"
+
+namespace i18n {
+namespace phonenumbers {
+
+class EncodingUtils {
+ public:
+  // Decodes one Unicode code-point value from a UTF-8 array. Returns the number
+  // of bytes read from the array. If the array does not contain valid UTF-8,
+  // the function stores 0xFFFD in the output variable and returns 1.
+  static inline int DecodeUTF8Char(const char* in, char32* out) {
+    Rune r;
+    int len = chartorune(&r, in);
+    *out = r;
+    return len;
+  }
+
+  static const char* AdvanceOneUTF8Character(const char* buf_utf8) {
+      return buf_utf8 + UniLib::OneCharLen(buf_utf8);
+  }
+
+  static const char* BackUpOneUTF8Character(const char* start,
+                                            const char* end) {
+    while (start < end && UniLib::IsTrailByte(*--end)) {}
+    return end;
+  }
+};
+
+}  // namespace phonenumbers
+}  // namespace i18n
+
+#endif  // I18N_PHONENUMBERS_ENCODING_UTILS_H_